Honing device



Sept. 16, 1958 Filed March 26, 1956 .L HANSEN HoNING DEVICE 2Sheets-Sheet 1 FIG. a

ATTORNEY Sept. 16, 1958 J. HANSEN 2,851,834

HONING DEVICE l 2 Sheetg-Sheet 2 Filed'lvxaroh 26; 195e Y 68 Flc-L6 INVEN TOR. JOHN HANSEN ATTORNEY- United States Patent O "ice HONING DEVICE.lohn Hansen, Bettendorf, Iowa Application March 26, 1956, Serial No.573,761

14 Claims. (Cl. 51-250) This invention relates to a honing deviceandespecially to such device as capable of use in honing the several bladesof bread-slicing machines, for example.

A typical bread slicer, specifically a slicer of the endless band type,includes a pair of drums rotatable about spaced apart parallel axes anda plurality of endless slicer bands trained about the drums, each bandbeing crossed in the form of a figure eight so as to present at the zoneof intersection of the straight runs of the band a pair of cutting edgesmaintained by appropriate guides in parallel planes nor-mal to the drumaxes. The several bands thus present several cutting edges through whichloaves of bread vare passed along a path cut by the blades, the loavesbeing thus sliced in accordance with the number of cutting edgesinvolved. These bands have .a substantial useful life measuredordinarily by the number of loaves cut before defects begin appearing inthe loaves, such as crumbing, snow, crushing, etc., depending upon thenature of the loaves as to type and texture. When the bands show signsof extreme failure in any of the respects noted, they are usuallyremoved from the slicer :and returned to the manufacturer forre-sharpening, which is distinguished from honing because in there-sharpening process the individual bands are placed on specialmachines and actually re-ground. lle-sharpening or re-grindng, however,is relatively costly as compared with honing and accord ingly operatorsof the slicer machines in bakeries prefer to postpone re-grinding byhoning the bands from time to time to improve the performance thereofuntil such time as re-grinding is inevitable. For this purpose severaltypes of honing devices have appeared in the industry with varyingdegrees of commercial acceptance. It is an absolute requirement that thehoning device be capable of use while the bands are still installed inthe Slicer, and for this purpose all such devices include means of oneform or another for the mounting thereof on the slicer in the slicingzone or proximate thereto. Some devices are capable of honing only oneside yof one band lat a time, others can hone both sides of a singleband and some are designed to hone several bands simultaneously. Alloperate on the principle of positioning the device and running theslicer, preferably at a relatively slower speed. In addition to theforegoing, the safety factor is important, for an operator using thehone is precariously acceptable as to initial cost, maintenance andperformance.

The principal object of the present invention is directed toward theprovision of a honing device satisfactorily meeting the aboverequirements in addition to including several novel and significantattributes. The inventive design features the honing of both sides of aband simultane ously by hones spaced lengthwise of the band or blade, sothat the hones respectively contact the blade from opposite sides, inthis respect the invention providing for the utilization of theintervening portion of the blade in unsupported fashion so that theblade in the honing zone is capable of ilexing to thereby improve thehoning characteristic by enabling the band to yield laterally accordingPatented Sept. 16, 1958 cutting edge, at which point it is significantto note that the popular slicer bands are scalloped along their cuttingedges and thus present alternate peaks and valleys that diierentiate thehoning problems from mere sharpening of perfectly straight edges as inordinary knives.

The invention features also the employment of biasing means for applyinga honing pressure to the hones, plus means for regulating the pressure,especially in conjunction with a single actuator that functions also ltomove the hones back and forth or out of and into honing position. Anobject of the invention is also to improve the mounting of the devicefor interchangeability of position on the slicer so as to be movablefrom blade to blade.

A further object is the provision of .a simplified honing device havingrelatively few working parts and utilizing these few parts to thefullest to produce an in-and-out honing motion combined with a rollinghoning motion `so as to improve the honing characteristics `of bladeshaving scalloped cutting edges. A specific object is to employ areciprocating actuator and to mount the hone carriers, preferablyindividually, on the actuator for reciprocation therewith but forangular movement relative thereto, together with means biasing the honecarriers angularly so as to apply honing pressure laterally inwardlyagainst opposite sides of the blade, preferably in a blade zoneintervening between guides spaced lengthwise of the blade.

to the uneven but regular variations in the sides of the In anothersignificant aspect, the 4invention features means combining to regulatethe angular pressure of the biasing means and to retract the carriersagainst the bias of the biasing means.

The foregoing objects, while accomplished in a device intendedpri-marilyfor the honing of blades of the endless band type, are available lingeneral sameness but in perhaps different degrees in the honing ofreciprocating blades.

The foregoing objects and features, along with others of significance,will lappear as 4a preferred embodiment of the invention is disclosed,by way of example in the ensuing specification and annexed sheets ofdrawings, the several figures of which are described immediately below.

Figure l is a plan view of the honing device.

Figure 2 is a rear elevation.

Figure 3 is a section, on an enlarged scale, as seen along the line 3-3of Figure 2.

Figure 4 is a front elevation, on a reduced scale, of the portionindicated by the line 4--4 in Figure 3.

Figure 5 is an enlarged section on the line 5-5 of Figure 4.

Figure 6 .is a section, drawn to an enlarged scale, on the line 6--6 ofFigure 4. i

Figure 7 is an enlarged fragmentary section on the line 7-7 of Figure 3.

Figure 8 is lan exaggerated enlargement of the relationship between ablade, shown in section, and a part of a hone at one side thereof.

A basic part of the Slicer machine is shown fragmentarily at 10 inFigure l as including ta side wall to which the honing device isattached by means of a support comprising a pair of parallel rods 12;although, other means of support could Well be provided, particularly incases in which the basic slicer lends itself to such changes. Hence, thesupporting characteristics are intended to be representative and notlimiting. Straight sections of several blades are shown at B, it beingunderstood that in the case of an endless band type Slicer the omittedportions of the bands are looped around spaced apart parallel drums asaforesaid; or, in a reciprocating slicer, opposite The blades are shownas being uniformly spaced apart on the order of the thickness of theloaf slices to be cut. Thus each blade runs or travels (as respects thepart thereof material here) in a generally upright cutting plane. Here,as in the appended claims, expressions such as upright, front, rear etc.are used in the interests of convenience and brevity and are not termsof limitation, since the parts may be located otherwise relative to eachother.

Each blade shown is of the scalloped cutting edge type, typical, forexample, of those shown in the U. S. patents to Hansen Nos. 2,062,812;2,082,832 and 2,596,851, the cutting edge here being designated by theletter C, scalloped to provide alternate peaks and valleys P and Vrespectively and, conventionally, beveled at opposite sides as at D,whereby the intersection of the plane of each bevel with the peaks andvalleys leaves the respective side of the blade, along the cutting edgeC, with uniformly spaced high spots H occurring at the sides of thepeaks because of the missing portions of the blade effected by theprovision of the valleys B. Consequently, it will be seen that thehoning problem presents, on the basis of the nature of the blade alone,certain characteristics not involved in sharpening or honing a simplestraight cutting edge; although, as will be hereinafter apparent, theprinciples here elaborated are beneficial in honing other types ofedges.

The support rods are suitably afiixed to the Slicer part 1t) as bybrackets, only one of which is shown at 14, it being understood that asimilar bracket is afforded at the opposite side of the machine. Therods 12 are transverse to and behind the blades B and accordinglydispose also behind the blades a base or base member made up of a slide16 and a housing 18. The slide is mounted on the rods 12 by means ofbearings 20 so that the base may be shifted lengthwise of the rods andthus may be located relative to any one of the several blades accordingto engagement of the selected blade by upper and lower guide means 22and 24 carried at the front open end 26 of the housing 18. Each guidemeans compromises a pair of closely spaced apart guides of any suitabledesign adapted to receive the blade rather closely but freelytherebetween so as to confine the blade and base against relativelateral displacement. Since the guide means 22 and 24 are spaced apartvertically, it follows that the blade is confined or guided atvertically spaced portions thereof and the intervening zone of the bladeis laterally unsupported. As will appear subsequently, the honingoperation takes place in this zone or area intermediate the upper andlower guides. The guide members may be removably securedto the upper andlower front portions of the housing 18 as by recessed-head screws 28(Figure l), whereby the guide members may be readily adjusted and/ orremoved and replaced in event of wear.

The housing 18 is mounted on the slide 16 for fore-'andaft movement bymeans of a dovetail connection including a female part 30 on the slideand a male part 32 on the housing. The purpose of the dovetailconnection is to enable the housing to be retracted from its Figures land 3 position and relative to the slide to a rearward position in whichthe guide means 22 and 24 clear the blade B, so that the base as a wholecan be shifted to the next or some other blade, after which the housingis shifted forwardly relative to the slide, with the guide meansengaging and locating the base relative to such other blade. Duringlateral shifting, the base slides lengthwise of the rods i?. via thebearings 2t?. A stop 34, carried by the rear of the male dovetail part32 (Figure 3) engages the slide 16 to limit forward movement of thehousing and this stop is instrumental for locating the startingpositions of upper and lower hones 36 and 38 relative to the blade B.These hones, their mounting and their functions will appear in detailbelow.

The housing 13 is bell-shaped, having its front end 26 open and havingat its closed rear end a coaxial integral bearing boss 40 borefore-and-aft to afford a bearing 42 for an actuator member, here in theform of a tubular shaft 44. The bearing 42 constitutes means mountingthe actuator on the housing and thus on the base for back and forthmovement along a fore-and-aft actuator path, which is here the principleaxis of the shaft and which axis lies in the plane of the blade. Statedotherwise, the honing device is symmetrical at opposite sides of anupright median plane which is preferably coincident with the blade planeand the axis is included in this plane. In addition to the fore-and-aftmovement, the means provided by the bearing 42 carries the actuatorshaft for angular movement about this axis, and a handle 46 on the rearend of the actuator affords means for imparting movement to theactuator. For reasons that will appear below, movement of the actuatorshaft, both in reciprocation and in rocking, is under control of angularcontrol means, designated in its entirety by the numeral 48.

This means includes a guide element or slot 50, in the form of a spiralor the section of a helix, provided in the upper portion of the actuatorshaft 44., and a follower element comprising the cylindrical end 52 of athreaded stud 54 screwed into a vertically tapped enlargement 56 of thebearing boss 40. Hence, as the actuator is moved forwardly, it receivesalso a counter-clockwise angular motion (as viewed from in front inFigures 4 and 5); conversely, when the actuator is retracted to its rearposition, the actuator turns reversely. Opposite ends of the slot 50limit both fore-and-aft and angular movement of the actuator. Inaddittion, the follower element is so dimensioned as to fit loosely inthe slot, at least in an angular direction, and thereby affords lostmotion by means of which the actuator can be rocked selectively inopposite directions independent of fore-and-nft movement. Normally, aclearance is afforded at 5S (Figure 7) for the purpose of achieving theaforesaid rockability of the actuator.

The hones 36 and 38, referred to above but generally, are carried by theactuator for fore-and-aft movement in unison with the actuator as wellas for lateral movement relative to the actuator. Broadly, the actuatoris included in means mounting the hones on the base or base member.Specifically, the mounting of the hones includes a cup-shaped hub 60bored at 62 to coaxially receive the front end of the actuator, to whichit is pinned by a cross pin 64 (Figure 6) and becomes in effect part ofthe actuator. The cup shape of the hub is afforded by an annularforwardly facing recess 66 which is divided into a pair of substantiallyidentical arcuate pockets 63 and 7i) by a pair of generallydiametrically opposed spring anchors 72 and 74. In the embodiment shown,the anchors are separate members secured in the pockets by screws orpins 76 and 78, respectively; although, other constructions are notexcluded.

The hub 60 has an integral forward coaxial extension or stub shaft 80which mounts upper and lower hone carriers 82 and 84 for individualangular movement relative to the actuator and hub and relative to eachother. These carriers have at their respective inner ends bored hubportions 86 and 88 for mounting on the hub extension 8f), and arerecessed at 90 and 92 respectively at their outer ends to afford meansfor mounting the hones 36 and 33. The forward end of the stub shaft orextension titl is bored and tapped and receives a retaining screw 9d,which includes a washer 96 to suitably retain and journal the honecarriers 82 and 84.

The recesses and 92 of the hone carriers respectively have inclinedhone-mounting surfaces 98 and 100, which surfaces converge forwardly andare thus in convergent relation to the median or blade plan. The honeshave complementary surfaces and are therefore themselves in forwardlyconvergent relation to each other and to the blade plane. Mounting ofthe hones on the carriers is completed by dowels and screws, as at 102for the hone 36 and 104. for the hone 38.

Although the carriers 82 and 84 are ahead of the hub 6u, theyrespectively have rearwardly projecting ears or spring-receivingportions or members 106 and 108 which loosely enter the respective hubpockets 68 and 70 to aiford lugs against which biasing means, herecurved compression springs 110 and 112, act, these springs reactingrespectively on the spring anchors '72 and 74 t0 urge the carriers 82and 84 individually in a counterclockwise direction as seen in Figures 4and 5. In Figure 5, even though the section line 5-5 on Figure l isbehind the main parts of the hone carriers, these parts have been shownin broken lines for orienting the structure. Spring retaining studs 114,116, 118 and 120 are provided respectively on the anchors 72 and '74 ando n the spring-receiving members or ears 106 and 108. The biasing actionof the springs 110 and 112 is limited by individual stop elements orpins 122 and 124, carried by the hub 60 within the arcuate pockets 63and '70 and interposed respectively ahead of the ears 106 and 108. Thesepins limit the angular amount that the carriers can movecounterclockwise (Figure 5) relative to the actuator, for reasons thatwill become immediately apparent.

As `described before, the follower pin 52 normally occupies a positionin which the clearance 58 occurs between it and the far side of theguide slot 50 when the actuator is retracted or in its rear position. Atthis time, the carrier ears 106 and 108 are pressed into engagement withthe stop pins 122 and 124 by the springs 110 and 112. The design is suchthat under these conditions, the hones are disposed to engage oppositesides of the cutting edge of the blade with but slight pressure, theamount of pressure `desired in this respect and at this point beingdependent upon the positions of the pins 122 and 124 relative to thelateral spacing of the hones at their forward ends, the angles anddimensions lof the blade and the retracted or starting positions of thehones. With these factors known, the proper relationship may be designedinto the honing device. Another factor is the angle of convergence ofthe hones relative to the blade for median plane, plus the fact thatsince the hone carriers are mounted on the actuator and since the pathof the actuator is its axis, which lies in the median plane, the honecarriers would travel forwardly and rearwardly in paths parallel to saidaxis except for the effect of the spiraling motion produced by theangular control means 48. If the hones traveled in paths parallel to theactuator axis, they would not hone the sides of the blade, since thesides of the blade at the cutting edge C are convergent in a forwarddirection as respects the use of the terms front and rear in thisdisclosure. Therefore, what is required is the combination fore-andaftand rolling motion of the hones as imparted by the angular control means48, plus the honing pressure applied by the springs 110 and 112 aslimited by the stop pins 122 and 124.

The above may be comprehended by assuming that the hone carriers arerigidly mounted on the front end of the actuator and that the lostmotion or clearance at 58 is non-existent. Under these conditions,forward movement of the actuator and carriers will be in unison and willalso incur rocking of the actuator and carriers as a unit about thefore-and-aft axis of the actuator because of the means 48. If the angleof each hone to the median or blade plane is exactly equal to the angleof the bevel on the cutting edge at the respective side of the blade,the hone would stroke the blade evenly from rear to front and the sameevenness of pressure would occur from front to rear as the actuator isretracted. However, a scalloped blade has no simple or single angle suchas that assumed. In stead, the angles to the centerline of the bladevary from peak to peak, being smaller at the peaks, because the bevel atD is longer, and larger in the valleys, because the bevel D in that zoneis shorter and more sharply inclined.

Figure 8 illustrates the above in somewhat exaggerated fashion, whereinthe line x--x represents the centerline 0r median plane of the blade B.The angle between this line x-x and the bevel D in a valley V may betermed angle a; the angle between the bevel D and the line x-x at a peakP may be termed angle b; and the angle of convergence of the hone 36 tothe line x-x is angle c. In a commercial design, these angles arerespectively: 61/2, 11/2 and 4 degrees. Hence, the hones, starting atthe backs of the bevels 'D and moving forwardly at their 4 angles, couldnot hone the sides of the valleys and peaks both unless somecompensatory movement is designed into the honing device such as thathere afforded by the angular control means 4S plus the honing pressureapplied by the springs 110 and 112 on the angularly movable carriers 82and 84. Thus, as the hones move forwardly they also move inwardly, notonly because the angle of the slot to the upright median plane throughthe aXis of the actuator is also 4, but because of the pressure of thesprings 110 and 112, and the hones therefore tend to traverse the bladeplane, as suggested by the diference between the full-line andbroken-line positions of the hone 36 in Figure 8, it being understoodthat the other hone moves similarly but in the opposite direction, sincethe hone carriers are spaced above and below the actuator axis as wellas being offset laterally to opposite sides of the blade plane.

When the user, by means of the handle 46, moves the actuator forwardly,he will tend to give the actuator a twisting motion in the samedirection that motion is imparted by the slot 50 and pin 52, hence usingup the lost motion or clearance at 58 so that the same space will nowexist at the diametrically opposite side of the pin 52. Since the honesare now in engagement with opposite sides of the blade, the blade ineffect yieldingly stops the hones against further lateral movementinwardly, and the stop pins 122 and 124 on the hub 60 thus gainangularly on the carrier ears 106 and 108 and hence become'spacedrespectively from the ears in an advance angular direction so that thesprings 110 and 112 are no longer opposed by the pins 122 and 124 butare instead opposed by the blade and are now free to exert theirpressure on the hones and also to allow the hones to float laterally asthe hones accommodate themselves to the congurations of the sides of theblade. It is understood, of course, that the blade is travelingvertically during the honing operation. In a, preferred construction,the hones may be impregnated at their blade engaging sides to a depth ofone-sixteenth of an inch and after they wear to this point they shouldbe replaced. Accordingly, the lost motio-n at 58 is also onesixteenth ofan inch, so that as the hones wear the carriers gain on the stop pins122 and 124 until, at the end of the limit, the ears on the carriersengage the pins 122 and 124 and further useful honing cannot beaccomplished.

Another function of the stop pins 122 and 124 is to keep the honesspaced laterally apart a sufficient distance, when retracted, to enablethem to move into honing position without honing the sides of the bladenear its back edge. Thus, the user may turn the actuatorreversely, whilethe hones are retracted, and this will bring the stop pins 122 and 124in engagement with the respective carrier ears 106 and 11i-8 and ineffect angularly retract the carriers to their initial spacing.

The recessing of the springs 110 and 112 in the front of the hub adds tothe compactness of the structure and aiords a simple method of conningthe springs and controlling their acti-on on the hone carriers. Mountingof the hub 60 on the front end of the actuator shaft produces aneconomical design that may be readily fabricated, assembled anddisassembled. The importance of the combined fore-and-aft and rollingmotion of the hones has been stressed above. Other features notcategorically enumerated will readily occur to those versed in the art,as willl modifications in the preferred embodiment disclosed, all ofwhich may be achieved without departure from the spirit and scope of theinvention.

What is claimed is:

1. A honing device for honing opposite sides of the cutting edge of anelongated flexible blade that runs generally in an upright plane,comprising: a support positioned behind the blade; a base on the supportand having front and rear ends respectively adjacent to and remote fromthe blade; an actuator carried by the base for baclf. and forth movementalong a fore-and-aft axis; first and second individual hone carriersmounted on the actuator for angular movement relative to each other andrelative to the actuator about said axis, said rst carrier extendingupwardly to an upper free end at a level above the aforesaid axis andoffset laterally to one side of the blade plane, and said second carrierextending downwardly to a lower free end at a level below said axis andoffset laterally to the other side of the blade plane; upper and lowerhone-mounting means respectively on said upper and lower ends formounting upper and lower hones to extend forwardly into engagementrespectively with opposite sides of the blade at vertically spacedportions of the blade; biasing means acting on the hone carriers andreacting against the actuator for urging the hone carriers to turn aboutsaid axis in such direction as to cause said upper and lower honecarriers to move laterally inwardly and thus to apply honing pressure tosaid opposite sides of the blade via the upper and lower hones; andmeans for moving the actuator back and forth along said axis to move thehones back and forth across the opposite sides of the blade.

2. The invention defined in claim 1, in which: the actuator carriesfixed thereto a coaxial hub having a pair of diametrically spaced springanchors thereon; and the biasing means comprises a pair of springsrespectively acting on the hone carriers and respectively reactingagainst said anchors.

3. The invention defined in claim 2, in which: said hub has a pair ofarcuate pockets therein opening axially to the hone carriers; theanchors are mounted on the hub respectively within said pockets; thehone carriers respectively have spring receivers projecting axially intothe pockets respectively in angularly spaced relation to said anchors;and the springs are curved and are respectively received within saidpockets, one spring extending arcuately between one anchor and onespring receiver and the other spring extending arcuately between theother anchor and receiver.

4. The invention defined in claim l, in which: each hone-mounting meanshas a hone-engageable surface disposed in forwardly convergent relationto the blade plane so that the hone mounted thereby is likewise disposedin forwardly convergent relation to said plane.

5. The invention defined in claim 4, in which: the actuator is carriedby the base for angular movement about said axis in addition to saidback and forth movement; and angular control means including a guideelement the section of a helix and a follower element following saidguide element, one element being on the actuator and the other being onthe base for effecting turning of the actuator in the direction of theaction of the biasing means during forward movement of the actuator andfor effecting reverse turning of the actuator during backward movementof the actuator.

6. The inventionA defined in claim 1, including: guidel means on thebase for engaging the blade from behind to confine the blade and baseagainst relative lateral movement; the fore-and-aft axis of the actuatorlies substantially in the blade plane; and the hone carriers aresymmetrically arranged both vertically and laterally as respects saidaxis.

7. The invention defined in claim 1, in which: the actuator is carriedby the base for angular movement about said fore-and-aft axis inaddition to said back and forth movement to enable turning of theactuator selectively in the counter to the direction of the action ofthe biasing means when the hones engage their respective sides of theblades.

8. The invention defined in claim 1, including: stop members carried bythe actuator and engaged by the hone carriers under action of thebiasing means for limiting lateral inward movement of the hone carriers;means mounting the actuator on the base for angular movement about saidfore-and-aft axis in addition to and independently of said back andforth movement; and means for selectively turning the actuator aboutsaid axis in opposite angular directions irrespective of thefore-and-aft position of the actuator so that with the hones inengagement with opposite sides of the blade the actuator is turnableabout said axis and in the direction of the action of said biasing meansso as to move the stop elements in said direction and angularly awayfrom the hone carriers whereby said biasing means applies honingpressure to the blade free of said stop elements and said actuator beingturnable in the opposite direction to reengage the stops with thecarriers.

9. The invention defined in claim l, including: means mounting theactuator on the base for angular movement about said axis in addition tosaid back and forth movement; angular control means cooperative betweenthe base and actuator for imparting advance and reverse turning movementof the actuator respectively during forward and rearward movementthereof so as to respectively incur lateral inward and outward movementof the [hone carriers relative to the blade, said control meansincluding a guide element in the form of a section of a helix and afollower element running along said guide element, one of said elementsbeing on the base and the other on the actuator; stop members on theactuator engageable by the hone carriers under action of the biasingmeans; and said guide and follower elements having provision for limitedangular lost motion to er1- able turning of the actuator independentlyof the imparted motion of the angular control means so as to regulatethe angular positions of the stop portions relative to the honecarriers.

10. A honing device for honing opposite sides of the cutting edge of anelongated flexible blade that runs generally in an upright plane,comprising: a support positioned behind the blade; a base on the supportand having front and rear ends respectively adjacent to and remote fromthe blade; an actuator carried by the base for back and forth movementalong a fore-and-aft axis; first and second hone carriers mounted on theactuator for angular movement relative to the actuator about said axis,said first carrier extending upwardly to an upper free end at a levelabove the aforesaid axis and offset laterally to one side of the bladeplane, and said second carrier extending ydownwardly to a lower free endat a level below said axis and offset laterally to the other side of theblade plane; upper and lower hone-mounting means respectively on saidupper and lower ends for mounting upper and lower hones to extendforwardly into engagement respectively with opposite sides of the bladeat vertically spaced portions of the blade; biasing means acting on thehome carriers to turn about said axis is such direction as to cause saidupper and lower hone carriers to move laterally inwardly and thus toapply honing pressure to said opposite sides of the blade via the upperand lower hones; and means for moving the actuator back and forth alongsaid axis to move the hones-back and forth across the opposite sides ofthe blade.

l1. The invention defined in claim 10, in which: the actuator is carriedby the base for angular movement about said axis in addition to saidback and forth movement; and angular control means including a guideelement the section of a helix and a follower element following saidguide element, one element being on the actuator and the other being onthe base for effecting turning of the actuator in the direction of theaction of the biasing means during forward movement of the actuator andfor effecting reverse turning of the actuator during backward movementof the actuator.

12. The invention defined in claim 10, including: means mounting theactuator on the base for angular movement about said axis in addition tosaid back and forth movement; angular control means cooperative betweenthe base and actuator for imparting advance and reverse turning movementof the actuator respectively duling forward and rearward movementthereof so as to respectively incur lateral inward and outward movementof the hone carriers relative to the blade, said control means includinga guide element in the form of a section of a helix and a followerelement running along said guide element, one of said elements being onthe base and the other on the actuator; stop members on the actuatorengageable by the hone carriers under action of the biasing means; andsaid guide and follower elements having provision for limited angularlost motion to enable turning of the actuator independently of theimparted motion of the angular control means so as to regulate theangular positions of the stop portions relai tive to the hone carriers.

13.A honing device for honing opposite sides of the cutting edge of anelongated flexible blade that runs generally in an upright plane,comprising: a support positioned behind the blade; a base on thesupportr and having front and rear ends respectively adjacent to andremote from the blade; an actuator carried by the base for back andforth movement along a fore-and-aft actuator path alined with the blade;upper and lower hone carriers mounted directly on the actuator forfore-and-aft movement with the actuator and for movement relative to theactuator transversely of said path; upper hone-mounting means on theupper hone carrier spaced above and laterally oiset to one side of saidpath for mounting an upper hone adapted to extend forwardly intoengagement with one side of the blade; lower hone-mounting means on thelower hone carrier for mounting a lower hone adapted to extend forwardlyinto engagement with the opposite side of the blade; biasing meansacting on the hone carriers and reacting on the actuator for urging thecarriers laterally inwardly; and means for moving the actuator back andforth along said actuator path to simultaneously move the hone carriersback and forth along vertically and laterally spaced apart honing paths.

14. A honing device for honing the cutting edge of an elongated bladethat runs generally in an upright plane, comprising: a supportpositioned behind the blade and including a base member having front andrear ends respectively adjacent to and remote from the blade; anactuator member carried by the base for back and forth movementrespectively away from and toward the blade; a hone carrier pivoted tothe actuator member for back and forth movement in unison with saidactuator member and for lateral movement relative to said actuatormember; hone-mounting means on the carrier for mounting a forwardlyextending hone adapted to engage one side of the blade; biasing meansacting on the carrier and reacting against the actuator member forurging the carrier laterally in such direction as to press the hone intothe blade; means mounting the actuator member on the base for angularmovement about a fore-and-aft axis so that turning thereof about saidaxis and in the direction of the action of the biasing means actsthrough the biasing means to move the hone carrier and hone laterally inthe aforesaid direction; and angular control means cooperative betweenthe members for turning the actuator member in `said directionsimultaneously with forward movement thereof and for turning theactuator member in the opposite direction simultaneously with rearwardmovement thereof.

Sweet Oct. 3, 1916 Crissey Ian. 9, 1951

